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remarkable-linux/drivers/video/fsl-diu-fb.c
Timur Tabi 5e7b911f9a drivers/video: fsl-diu-fb: don't initialize the THRESHOLDS registers 
The THRESHOLDS register configures thresholds for two interrupts, but
these interrupts are not used in the DIU driver.  An early version of the
driver may have used the "lines before vsync" interrupt, which requires
the LS_BF_VS of THRESHOLDS to be initialized.

Unfortunately, the initialization of this register does not do a
read-modify-write to set only LS_BF_VS.  On the MPC8610, the value
written is correct.  On other chips, like the P1022, the value overwrites
some reserved bits.  This results in a performance drop on the P1022.

Since the default value is acceptable as-is on all SOCs, we should just
avoid touching this register.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
2012-05-13 13:08:56 +00:00

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/*
* Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
*
* Freescale DIU Frame Buffer device driver
*
* Authors: Hongjun Chen <hong-jun.chen@freescale.com>
* Paul Widmer <paul.widmer@freescale.com>
* Srikanth Srinivasan <srikanth.srinivasan@freescale.com>
* York Sun <yorksun@freescale.com>
*
* Based on imxfb.c Copyright (C) 2004 S.Hauer, Pengutronix
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/clk.h>
#include <linux/uaccess.h>
#include <linux/vmalloc.h>
#include <linux/spinlock.h>
#include <sysdev/fsl_soc.h>
#include <linux/fsl-diu-fb.h>
#include "edid.h"
#define NUM_AOIS 5 /* 1 for plane 0, 2 for planes 1 & 2 each */
/* HW cursor parameters */
#define MAX_CURS 32
/* INT_STATUS/INT_MASK field descriptions */
#define INT_VSYNC 0x01 /* Vsync interrupt */
#define INT_VSYNC_WB 0x02 /* Vsync interrupt for write back operation */
#define INT_UNDRUN 0x04 /* Under run exception interrupt */
#define INT_PARERR 0x08 /* Display parameters error interrupt */
#define INT_LS_BF_VS 0x10 /* Lines before vsync. interrupt */
/*
* List of supported video modes
*
* The first entry is the default video mode. The remain entries are in
* order if increasing resolution and frequency. The 320x240-60 mode is
* the initial AOI for the second and third planes.
*/
static struct fb_videomode __devinitdata fsl_diu_mode_db[] = {
{
.refresh = 60,
.xres = 1024,
.yres = 768,
.pixclock = 15385,
.left_margin = 160,
.right_margin = 24,
.upper_margin = 29,
.lower_margin = 3,
.hsync_len = 136,
.vsync_len = 6,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 60,
.xres = 320,
.yres = 240,
.pixclock = 79440,
.left_margin = 16,
.right_margin = 16,
.upper_margin = 16,
.lower_margin = 5,
.hsync_len = 48,
.vsync_len = 1,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 60,
.xres = 640,
.yres = 480,
.pixclock = 39722,
.left_margin = 48,
.right_margin = 16,
.upper_margin = 33,
.lower_margin = 10,
.hsync_len = 96,
.vsync_len = 2,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 72,
.xres = 640,
.yres = 480,
.pixclock = 32052,
.left_margin = 128,
.right_margin = 24,
.upper_margin = 28,
.lower_margin = 9,
.hsync_len = 40,
.vsync_len = 3,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 75,
.xres = 640,
.yres = 480,
.pixclock = 31747,
.left_margin = 120,
.right_margin = 16,
.upper_margin = 16,
.lower_margin = 1,
.hsync_len = 64,
.vsync_len = 3,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 90,
.xres = 640,
.yres = 480,
.pixclock = 25057,
.left_margin = 120,
.right_margin = 32,
.upper_margin = 14,
.lower_margin = 25,
.hsync_len = 40,
.vsync_len = 14,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 100,
.xres = 640,
.yres = 480,
.pixclock = 22272,
.left_margin = 48,
.right_margin = 32,
.upper_margin = 17,
.lower_margin = 22,
.hsync_len = 128,
.vsync_len = 12,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 60,
.xres = 800,
.yres = 480,
.pixclock = 33805,
.left_margin = 96,
.right_margin = 24,
.upper_margin = 10,
.lower_margin = 3,
.hsync_len = 72,
.vsync_len = 7,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 60,
.xres = 800,
.yres = 600,
.pixclock = 25000,
.left_margin = 88,
.right_margin = 40,
.upper_margin = 23,
.lower_margin = 1,
.hsync_len = 128,
.vsync_len = 4,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 60,
.xres = 854,
.yres = 480,
.pixclock = 31518,
.left_margin = 104,
.right_margin = 16,
.upper_margin = 13,
.lower_margin = 1,
.hsync_len = 88,
.vsync_len = 3,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 70,
.xres = 1024,
.yres = 768,
.pixclock = 16886,
.left_margin = 3,
.right_margin = 3,
.upper_margin = 2,
.lower_margin = 2,
.hsync_len = 40,
.vsync_len = 18,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 75,
.xres = 1024,
.yres = 768,
.pixclock = 15009,
.left_margin = 3,
.right_margin = 3,
.upper_margin = 2,
.lower_margin = 2,
.hsync_len = 80,
.vsync_len = 32,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 60,
.xres = 1280,
.yres = 480,
.pixclock = 18939,
.left_margin = 353,
.right_margin = 47,
.upper_margin = 39,
.lower_margin = 4,
.hsync_len = 8,
.vsync_len = 2,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 60,
.xres = 1280,
.yres = 720,
.pixclock = 13426,
.left_margin = 192,
.right_margin = 64,
.upper_margin = 22,
.lower_margin = 1,
.hsync_len = 136,
.vsync_len = 3,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 60,
.xres = 1280,
.yres = 1024,
.pixclock = 9375,
.left_margin = 38,
.right_margin = 128,
.upper_margin = 2,
.lower_margin = 7,
.hsync_len = 216,
.vsync_len = 37,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 70,
.xres = 1280,
.yres = 1024,
.pixclock = 9380,
.left_margin = 6,
.right_margin = 6,
.upper_margin = 4,
.lower_margin = 4,
.hsync_len = 60,
.vsync_len = 94,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 75,
.xres = 1280,
.yres = 1024,
.pixclock = 9380,
.left_margin = 6,
.right_margin = 6,
.upper_margin = 4,
.lower_margin = 4,
.hsync_len = 60,
.vsync_len = 15,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
{
.refresh = 60,
.xres = 1920,
.yres = 1080,
.pixclock = 5787,
.left_margin = 328,
.right_margin = 120,
.upper_margin = 34,
.lower_margin = 1,
.hsync_len = 208,
.vsync_len = 3,
.sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
},
};
static char *fb_mode;
static unsigned long default_bpp = 32;
static enum fsl_diu_monitor_port monitor_port;
static char *monitor_string;
#if defined(CONFIG_NOT_COHERENT_CACHE)
static u8 *coherence_data;
static size_t coherence_data_size;
static unsigned int d_cache_line_size;
#endif
static DEFINE_SPINLOCK(diu_lock);
enum mfb_index {
PLANE0 = 0, /* Plane 0, only one AOI that fills the screen */
PLANE1_AOI0, /* Plane 1, first AOI */
PLANE1_AOI1, /* Plane 1, second AOI */
PLANE2_AOI0, /* Plane 2, first AOI */
PLANE2_AOI1, /* Plane 2, second AOI */
};
struct mfb_info {
enum mfb_index index;
char *id;
int registered;
unsigned long pseudo_palette[16];
struct diu_ad *ad;
int cursor_reset;
unsigned char g_alpha;
unsigned int count;
int x_aoi_d; /* aoi display x offset to physical screen */
int y_aoi_d; /* aoi display y offset to physical screen */
struct fsl_diu_data *parent;
u8 *edid_data;
};
/**
* struct fsl_diu_data - per-DIU data structure
* @dma_addr: DMA address of this structure
* @fsl_diu_info: fb_info objects, one per AOI
* @dev_attr: sysfs structure
* @irq: IRQ
* @monitor_port: the monitor port this DIU is connected to
* @diu_reg: pointer to the DIU hardware registers
* @reg_lock: spinlock for register access
* @dummy_aoi: video buffer for the 4x4 32-bit dummy AOI
* dummy_ad: DIU Area Descriptor for the dummy AOI
* @ad[]: Area Descriptors for each real AOI
* @gamma: gamma color table
* @cursor: hardware cursor data
*
* This data structure must be allocated with 32-byte alignment, so that the
* internal fields can be aligned properly.
*/
struct fsl_diu_data {
dma_addr_t dma_addr;
struct fb_info fsl_diu_info[NUM_AOIS];
struct mfb_info mfb[NUM_AOIS];
struct device_attribute dev_attr;
unsigned int irq;
enum fsl_diu_monitor_port monitor_port;
struct diu __iomem *diu_reg;
spinlock_t reg_lock;
u8 dummy_aoi[4 * 4 * 4];
struct diu_ad dummy_ad __aligned(8);
struct diu_ad ad[NUM_AOIS] __aligned(8);
u8 gamma[256 * 3] __aligned(32);
u8 cursor[MAX_CURS * MAX_CURS * 2] __aligned(32);
} __aligned(32);
/* Determine the DMA address of a member of the fsl_diu_data structure */
#define DMA_ADDR(p, f) ((p)->dma_addr + offsetof(struct fsl_diu_data, f))
static struct mfb_info mfb_template[] = {
{
.index = PLANE0,
.id = "Panel0",
.registered = 0,
.count = 0,
.x_aoi_d = 0,
.y_aoi_d = 0,
},
{
.index = PLANE1_AOI0,
.id = "Panel1 AOI0",
.registered = 0,
.g_alpha = 0xff,
.count = 0,
.x_aoi_d = 0,
.y_aoi_d = 0,
},
{
.index = PLANE1_AOI1,
.id = "Panel1 AOI1",
.registered = 0,
.g_alpha = 0xff,
.count = 0,
.x_aoi_d = 0,
.y_aoi_d = 480,
},
{
.index = PLANE2_AOI0,
.id = "Panel2 AOI0",
.registered = 0,
.g_alpha = 0xff,
.count = 0,
.x_aoi_d = 640,
.y_aoi_d = 0,
},
{
.index = PLANE2_AOI1,
.id = "Panel2 AOI1",
.registered = 0,
.g_alpha = 0xff,
.count = 0,
.x_aoi_d = 640,
.y_aoi_d = 480,
},
};
/**
* fsl_diu_name_to_port - convert a port name to a monitor port enum
*
* Takes the name of a monitor port ("dvi", "lvds", or "dlvds") and returns
* the enum fsl_diu_monitor_port that corresponds to that string.
*
* For compatibility with older versions, a number ("0", "1", or "2") is also
* supported.
*
* If the string is unknown, DVI is assumed.
*
* If the particular port is not supported by the platform, another port
* (platform-specific) is chosen instead.
*/
static enum fsl_diu_monitor_port fsl_diu_name_to_port(const char *s)
{
enum fsl_diu_monitor_port port = FSL_DIU_PORT_DVI;
unsigned long val;
if (s) {
if (!strict_strtoul(s, 10, &val) && (val <= 2))
port = (enum fsl_diu_monitor_port) val;
else if (strncmp(s, "lvds", 4) == 0)
port = FSL_DIU_PORT_LVDS;
else if (strncmp(s, "dlvds", 5) == 0)
port = FSL_DIU_PORT_DLVDS;
}
return diu_ops.valid_monitor_port(port);
}
/*
* Workaround for failed writing desc register of planes.
* Needed with MPC5121 DIU rev 2.0 silicon.
*/
void wr_reg_wa(u32 *reg, u32 val)
{
do {
out_be32(reg, val);
} while (in_be32(reg) != val);
}
static void fsl_diu_enable_panel(struct fb_info *info)
{
struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
struct diu_ad *ad = mfbi->ad;
struct fsl_diu_data *data = mfbi->parent;
struct diu __iomem *hw = data->diu_reg;
switch (mfbi->index) {
case PLANE0:
if (hw->desc[0] != ad->paddr)
wr_reg_wa(&hw->desc[0], ad->paddr);
break;
case PLANE1_AOI0:
cmfbi = &data->mfb[2];
if (hw->desc[1] != ad->paddr) { /* AOI0 closed */
if (cmfbi->count > 0) /* AOI1 open */
ad->next_ad =
cpu_to_le32(cmfbi->ad->paddr);
else
ad->next_ad = 0;
wr_reg_wa(&hw->desc[1], ad->paddr);
}
break;
case PLANE2_AOI0:
cmfbi = &data->mfb[4];
if (hw->desc[2] != ad->paddr) { /* AOI0 closed */
if (cmfbi->count > 0) /* AOI1 open */
ad->next_ad =
cpu_to_le32(cmfbi->ad->paddr);
else
ad->next_ad = 0;
wr_reg_wa(&hw->desc[2], ad->paddr);
}
break;
case PLANE1_AOI1:
pmfbi = &data->mfb[1];
ad->next_ad = 0;
if (hw->desc[1] == data->dummy_ad.paddr)
wr_reg_wa(&hw->desc[1], ad->paddr);
else /* AOI0 open */
pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
break;
case PLANE2_AOI1:
pmfbi = &data->mfb[3];
ad->next_ad = 0;
if (hw->desc[2] == data->dummy_ad.paddr)
wr_reg_wa(&hw->desc[2], ad->paddr);
else /* AOI0 was open */
pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
break;
}
}
static void fsl_diu_disable_panel(struct fb_info *info)
{
struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
struct diu_ad *ad = mfbi->ad;
struct fsl_diu_data *data = mfbi->parent;
struct diu __iomem *hw = data->diu_reg;
switch (mfbi->index) {
case PLANE0:
if (hw->desc[0] != data->dummy_ad.paddr)
wr_reg_wa(&hw->desc[0], data->dummy_ad.paddr);
break;
case PLANE1_AOI0:
cmfbi = &data->mfb[2];
if (cmfbi->count > 0) /* AOI1 is open */
wr_reg_wa(&hw->desc[1], cmfbi->ad->paddr);
/* move AOI1 to the first */
else /* AOI1 was closed */
wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr);
/* close AOI 0 */
break;
case PLANE2_AOI0:
cmfbi = &data->mfb[4];
if (cmfbi->count > 0) /* AOI1 is open */
wr_reg_wa(&hw->desc[2], cmfbi->ad->paddr);
/* move AOI1 to the first */
else /* AOI1 was closed */
wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr);
/* close AOI 0 */
break;
case PLANE1_AOI1:
pmfbi = &data->mfb[1];
if (hw->desc[1] != ad->paddr) {
/* AOI1 is not the first in the chain */
if (pmfbi->count > 0)
/* AOI0 is open, must be the first */
pmfbi->ad->next_ad = 0;
} else /* AOI1 is the first in the chain */
wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr);
/* close AOI 1 */
break;
case PLANE2_AOI1:
pmfbi = &data->mfb[3];
if (hw->desc[2] != ad->paddr) {
/* AOI1 is not the first in the chain */
if (pmfbi->count > 0)
/* AOI0 is open, must be the first */
pmfbi->ad->next_ad = 0;
} else /* AOI1 is the first in the chain */
wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr);
/* close AOI 1 */
break;
}
}
static void enable_lcdc(struct fb_info *info)
{
struct mfb_info *mfbi = info->par;
struct fsl_diu_data *data = mfbi->parent;
struct diu __iomem *hw = data->diu_reg;
out_be32(&hw->diu_mode, MFB_MODE1);
}
static void disable_lcdc(struct fb_info *info)
{
struct mfb_info *mfbi = info->par;
struct fsl_diu_data *data = mfbi->parent;
struct diu __iomem *hw = data->diu_reg;
out_be32(&hw->diu_mode, 0);
}
static void adjust_aoi_size_position(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct mfb_info *lower_aoi_mfbi, *upper_aoi_mfbi, *mfbi = info->par;
struct fsl_diu_data *data = mfbi->parent;
int available_height, upper_aoi_bottom;
enum mfb_index index = mfbi->index;
int lower_aoi_is_open, upper_aoi_is_open;
__u32 base_plane_width, base_plane_height, upper_aoi_height;
base_plane_width = data->fsl_diu_info[0].var.xres;
base_plane_height = data->fsl_diu_info[0].var.yres;
if (mfbi->x_aoi_d < 0)
mfbi->x_aoi_d = 0;
if (mfbi->y_aoi_d < 0)
mfbi->y_aoi_d = 0;
switch (index) {
case PLANE0:
if (mfbi->x_aoi_d != 0)
mfbi->x_aoi_d = 0;
if (mfbi->y_aoi_d != 0)
mfbi->y_aoi_d = 0;
break;
case PLANE1_AOI0:
case PLANE2_AOI0:
lower_aoi_mfbi = data->fsl_diu_info[index+1].par;
lower_aoi_is_open = lower_aoi_mfbi->count > 0 ? 1 : 0;
if (var->xres > base_plane_width)
var->xres = base_plane_width;
if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
mfbi->x_aoi_d = base_plane_width - var->xres;
if (lower_aoi_is_open)
available_height = lower_aoi_mfbi->y_aoi_d;
else
available_height = base_plane_height;
if (var->yres > available_height)
var->yres = available_height;
if ((mfbi->y_aoi_d + var->yres) > available_height)
mfbi->y_aoi_d = available_height - var->yres;
break;
case PLANE1_AOI1:
case PLANE2_AOI1:
upper_aoi_mfbi = data->fsl_diu_info[index-1].par;
upper_aoi_height = data->fsl_diu_info[index-1].var.yres;
upper_aoi_bottom = upper_aoi_mfbi->y_aoi_d + upper_aoi_height;
upper_aoi_is_open = upper_aoi_mfbi->count > 0 ? 1 : 0;
if (var->xres > base_plane_width)
var->xres = base_plane_width;
if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
mfbi->x_aoi_d = base_plane_width - var->xres;
if (mfbi->y_aoi_d < 0)
mfbi->y_aoi_d = 0;
if (upper_aoi_is_open) {
if (mfbi->y_aoi_d < upper_aoi_bottom)
mfbi->y_aoi_d = upper_aoi_bottom;
available_height = base_plane_height
- upper_aoi_bottom;
} else
available_height = base_plane_height;
if (var->yres > available_height)
var->yres = available_height;
if ((mfbi->y_aoi_d + var->yres) > base_plane_height)
mfbi->y_aoi_d = base_plane_height - var->yres;
break;
}
}
/*
* Checks to see if the hardware supports the state requested by var passed
* in. This function does not alter the hardware state! If the var passed in
* is slightly off by what the hardware can support then we alter the var
* PASSED in to what we can do. If the hardware doesn't support mode change
* a -EINVAL will be returned by the upper layers.
*/
static int fsl_diu_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
if (var->xres_virtual < var->xres)
var->xres_virtual = var->xres;
if (var->yres_virtual < var->yres)
var->yres_virtual = var->yres;
if (var->xoffset < 0)
var->xoffset = 0;
if (var->yoffset < 0)
var->yoffset = 0;
if (var->xoffset + info->var.xres > info->var.xres_virtual)
var->xoffset = info->var.xres_virtual - info->var.xres;
if (var->yoffset + info->var.yres > info->var.yres_virtual)
var->yoffset = info->var.yres_virtual - info->var.yres;
if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
(var->bits_per_pixel != 16))
var->bits_per_pixel = default_bpp;
switch (var->bits_per_pixel) {
case 16:
var->red.length = 5;
var->red.offset = 11;
var->red.msb_right = 0;
var->green.length = 6;
var->green.offset = 5;
var->green.msb_right = 0;
var->blue.length = 5;
var->blue.offset = 0;
var->blue.msb_right = 0;
var->transp.length = 0;
var->transp.offset = 0;
var->transp.msb_right = 0;
break;
case 24:
var->red.length = 8;
var->red.offset = 0;
var->red.msb_right = 0;
var->green.length = 8;
var->green.offset = 8;
var->green.msb_right = 0;
var->blue.length = 8;
var->blue.offset = 16;
var->blue.msb_right = 0;
var->transp.length = 0;
var->transp.offset = 0;
var->transp.msb_right = 0;
break;
case 32:
var->red.length = 8;
var->red.offset = 16;
var->red.msb_right = 0;
var->green.length = 8;
var->green.offset = 8;
var->green.msb_right = 0;
var->blue.length = 8;
var->blue.offset = 0;
var->blue.msb_right = 0;
var->transp.length = 8;
var->transp.offset = 24;
var->transp.msb_right = 0;
break;
}
var->height = -1;
var->width = -1;
var->grayscale = 0;
/* Copy nonstd field to/from sync for fbset usage */
var->sync |= var->nonstd;
var->nonstd |= var->sync;
adjust_aoi_size_position(var, info);
return 0;
}
static void set_fix(struct fb_info *info)
{
struct fb_fix_screeninfo *fix = &info->fix;
struct fb_var_screeninfo *var = &info->var;
struct mfb_info *mfbi = info->par;
strncpy(fix->id, mfbi->id, sizeof(fix->id));
fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
fix->type = FB_TYPE_PACKED_PIXELS;
fix->accel = FB_ACCEL_NONE;
fix->visual = FB_VISUAL_TRUECOLOR;
fix->xpanstep = 1;
fix->ypanstep = 1;
}
static void update_lcdc(struct fb_info *info)
{
struct fb_var_screeninfo *var = &info->var;
struct mfb_info *mfbi = info->par;
struct fsl_diu_data *data = mfbi->parent;
struct diu __iomem *hw;
int i, j;
u8 *gamma_table_base;
u32 temp;
hw = data->diu_reg;
diu_ops.set_monitor_port(data->monitor_port);
gamma_table_base = data->gamma;
/* Prep for DIU init - gamma table, cursor table */
for (i = 0; i <= 2; i++)
for (j = 0; j <= 255; j++)
*gamma_table_base++ = j;
if (diu_ops.set_gamma_table)
diu_ops.set_gamma_table(data->monitor_port, data->gamma);
disable_lcdc(info);
/* Program DIU registers */
out_be32(&hw->gamma, DMA_ADDR(data, gamma));
out_be32(&hw->cursor, DMA_ADDR(data, cursor));
out_be32(&hw->bgnd, 0x007F7F7F); /* BGND */
out_be32(&hw->bgnd_wb, 0); /* BGND_WB */
out_be32(&hw->disp_size, (var->yres << 16 | var->xres));
/* DISP SIZE */
out_be32(&hw->wb_size, 0); /* WB SIZE */
out_be32(&hw->wb_mem_addr, 0); /* WB MEM ADDR */
/* Horizontal and vertical configuration register */
temp = var->left_margin << 22 | /* BP_H */
var->hsync_len << 11 | /* PW_H */
var->right_margin; /* FP_H */
out_be32(&hw->hsyn_para, temp);
temp = var->upper_margin << 22 | /* BP_V */
var->vsync_len << 11 | /* PW_V */
var->lower_margin; /* FP_V */
out_be32(&hw->vsyn_para, temp);
diu_ops.set_pixel_clock(var->pixclock);
out_be32(&hw->syn_pol, 0); /* SYNC SIGNALS POLARITY */
out_be32(&hw->int_status, 0); /* INTERRUPT STATUS */
out_be32(&hw->plut, 0x01F5F666);
/* Enable the DIU */
enable_lcdc(info);
}
static int map_video_memory(struct fb_info *info)
{
u32 smem_len = info->fix.line_length * info->var.yres_virtual;
void *p;
p = alloc_pages_exact(smem_len, GFP_DMA | __GFP_ZERO);
if (!p) {
dev_err(info->dev, "unable to allocate fb memory\n");
return -ENOMEM;
}
mutex_lock(&info->mm_lock);
info->screen_base = p;
info->fix.smem_start = virt_to_phys(info->screen_base);
info->fix.smem_len = smem_len;
mutex_unlock(&info->mm_lock);
info->screen_size = info->fix.smem_len;
return 0;
}
static void unmap_video_memory(struct fb_info *info)
{
void *p = info->screen_base;
size_t l = info->fix.smem_len;
mutex_lock(&info->mm_lock);
info->screen_base = NULL;
info->fix.smem_start = 0;
info->fix.smem_len = 0;
mutex_unlock(&info->mm_lock);
if (p)
free_pages_exact(p, l);
}
/*
* Using the fb_var_screeninfo in fb_info we set the aoi of this
* particular framebuffer. It is a light version of fsl_diu_set_par.
*/
static int fsl_diu_set_aoi(struct fb_info *info)
{
struct fb_var_screeninfo *var = &info->var;
struct mfb_info *mfbi = info->par;
struct diu_ad *ad = mfbi->ad;
/* AOI should not be greater than display size */
ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
return 0;
}
/**
* fsl_diu_get_pixel_format: return the pixel format for a given color depth
*
* The pixel format is a 32-bit value that determine which bits in each
* pixel are to be used for each color. This is the default function used
* if the platform does not define its own version.
*/
static u32 fsl_diu_get_pixel_format(unsigned int bits_per_pixel)
{
#define PF_BYTE_F 0x10000000
#define PF_ALPHA_C_MASK 0x0E000000
#define PF_ALPHA_C_SHIFT 25
#define PF_BLUE_C_MASK 0x01800000
#define PF_BLUE_C_SHIFT 23
#define PF_GREEN_C_MASK 0x00600000
#define PF_GREEN_C_SHIFT 21
#define PF_RED_C_MASK 0x00180000
#define PF_RED_C_SHIFT 19
#define PF_PALETTE 0x00040000
#define PF_PIXEL_S_MASK 0x00030000
#define PF_PIXEL_S_SHIFT 16
#define PF_COMP_3_MASK 0x0000F000
#define PF_COMP_3_SHIFT 12
#define PF_COMP_2_MASK 0x00000F00
#define PF_COMP_2_SHIFT 8
#define PF_COMP_1_MASK 0x000000F0
#define PF_COMP_1_SHIFT 4
#define PF_COMP_0_MASK 0x0000000F
#define PF_COMP_0_SHIFT 0
#define MAKE_PF(alpha, red, blue, green, size, c0, c1, c2, c3) \
cpu_to_le32(PF_BYTE_F | (alpha << PF_ALPHA_C_SHIFT) | \
(blue << PF_BLUE_C_SHIFT) | (green << PF_GREEN_C_SHIFT) | \
(red << PF_RED_C_SHIFT) | (c3 << PF_COMP_3_SHIFT) | \
(c2 << PF_COMP_2_SHIFT) | (c1 << PF_COMP_1_SHIFT) | \
(c0 << PF_COMP_0_SHIFT) | (size << PF_PIXEL_S_SHIFT))
switch (bits_per_pixel) {
case 32:
/* 0x88883316 */
return MAKE_PF(3, 2, 0, 1, 3, 8, 8, 8, 8);
case 24:
/* 0x88082219 */
return MAKE_PF(4, 0, 1, 2, 2, 0, 8, 8, 8);
case 16:
/* 0x65053118 */
return MAKE_PF(4, 2, 1, 0, 1, 5, 6, 5, 0);
default:
pr_err("fsl-diu: unsupported color depth %u\n", bits_per_pixel);
return 0;
}
}
/*
* Using the fb_var_screeninfo in fb_info we set the resolution of this
* particular framebuffer. This function alters the fb_fix_screeninfo stored
* in fb_info. It does not alter var in fb_info since we are using that
* data. This means we depend on the data in var inside fb_info to be
* supported by the hardware. fsl_diu_check_var is always called before
* fsl_diu_set_par to ensure this.
*/
static int fsl_diu_set_par(struct fb_info *info)
{
unsigned long len;
struct fb_var_screeninfo *var = &info->var;
struct mfb_info *mfbi = info->par;
struct fsl_diu_data *data = mfbi->parent;
struct diu_ad *ad = mfbi->ad;
struct diu __iomem *hw;
hw = data->diu_reg;
set_fix(info);
mfbi->cursor_reset = 1;
len = info->var.yres_virtual * info->fix.line_length;
/* Alloc & dealloc each time resolution/bpp change */
if (len != info->fix.smem_len) {
if (info->fix.smem_start)
unmap_video_memory(info);
/* Memory allocation for framebuffer */
if (map_video_memory(info)) {
dev_err(info->dev, "unable to allocate fb memory 1\n");
return -ENOMEM;
}
}
if (diu_ops.get_pixel_format)
ad->pix_fmt = diu_ops.get_pixel_format(data->monitor_port,
var->bits_per_pixel);
else
ad->pix_fmt = fsl_diu_get_pixel_format(var->bits_per_pixel);
ad->addr = cpu_to_le32(info->fix.smem_start);
ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) |
var->xres_virtual) | mfbi->g_alpha;
/* AOI should not be greater than display size */
ad->aoi_size = cpu_to_le32((var->yres << 16) | var->xres);
ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
/* Disable chroma keying function */
ad->ckmax_r = 0;
ad->ckmax_g = 0;
ad->ckmax_b = 0;
ad->ckmin_r = 255;
ad->ckmin_g = 255;
ad->ckmin_b = 255;
if (mfbi->index == PLANE0)
update_lcdc(info);
return 0;
}
static inline __u32 CNVT_TOHW(__u32 val, __u32 width)
{
return ((val << width) + 0x7FFF - val) >> 16;
}
/*
* Set a single color register. The values supplied have a 16 bit magnitude
* which needs to be scaled in this function for the hardware. Things to take
* into consideration are how many color registers, if any, are supported with
* the current color visual. With truecolor mode no color palettes are
* supported. Here a pseudo palette is created which we store the value in
* pseudo_palette in struct fb_info. For pseudocolor mode we have a limited
* color palette.
*/
static int fsl_diu_setcolreg(unsigned int regno, unsigned int red,
unsigned int green, unsigned int blue,
unsigned int transp, struct fb_info *info)
{
int ret = 1;
/*
* If greyscale is true, then we convert the RGB value
* to greyscale no matter what visual we are using.
*/
if (info->var.grayscale)
red = green = blue = (19595 * red + 38470 * green +
7471 * blue) >> 16;
switch (info->fix.visual) {
case FB_VISUAL_TRUECOLOR:
/*
* 16-bit True Colour. We encode the RGB value
* according to the RGB bitfield information.
*/
if (regno < 16) {
u32 *pal = info->pseudo_palette;
u32 v;
red = CNVT_TOHW(red, info->var.red.length);
green = CNVT_TOHW(green, info->var.green.length);
blue = CNVT_TOHW(blue, info->var.blue.length);
transp = CNVT_TOHW(transp, info->var.transp.length);
v = (red << info->var.red.offset) |
(green << info->var.green.offset) |
(blue << info->var.blue.offset) |
(transp << info->var.transp.offset);
pal[regno] = v;
ret = 0;
}
break;
}
return ret;
}
/*
* Pan (or wrap, depending on the `vmode' field) the display using the
* 'xoffset' and 'yoffset' fields of the 'var' structure. If the values
* don't fit, return -EINVAL.
*/
static int fsl_diu_pan_display(struct fb_var_screeninfo *var,
struct fb_info *info)
{
if ((info->var.xoffset == var->xoffset) &&
(info->var.yoffset == var->yoffset))
return 0; /* No change, do nothing */
if (var->xoffset < 0 || var->yoffset < 0
|| var->xoffset + info->var.xres > info->var.xres_virtual
|| var->yoffset + info->var.yres > info->var.yres_virtual)
return -EINVAL;
info->var.xoffset = var->xoffset;
info->var.yoffset = var->yoffset;
if (var->vmode & FB_VMODE_YWRAP)
info->var.vmode |= FB_VMODE_YWRAP;
else
info->var.vmode &= ~FB_VMODE_YWRAP;
fsl_diu_set_aoi(info);
return 0;
}
static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
unsigned long arg)
{
struct mfb_info *mfbi = info->par;
struct diu_ad *ad = mfbi->ad;
struct mfb_chroma_key ck;
unsigned char global_alpha;
struct aoi_display_offset aoi_d;
__u32 pix_fmt;
void __user *buf = (void __user *)arg;
if (!arg)
return -EINVAL;
switch (cmd) {
case MFB_SET_PIXFMT_OLD:
dev_warn(info->dev,
"MFB_SET_PIXFMT value of 0x%08x is deprecated.\n",
MFB_SET_PIXFMT_OLD);
case MFB_SET_PIXFMT:
if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt)))
return -EFAULT;
ad->pix_fmt = pix_fmt;
break;
case MFB_GET_PIXFMT_OLD:
dev_warn(info->dev,
"MFB_GET_PIXFMT value of 0x%08x is deprecated.\n",
MFB_GET_PIXFMT_OLD);
case MFB_GET_PIXFMT:
pix_fmt = ad->pix_fmt;
if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt)))
return -EFAULT;
break;
case MFB_SET_AOID:
if (copy_from_user(&aoi_d, buf, sizeof(aoi_d)))
return -EFAULT;
mfbi->x_aoi_d = aoi_d.x_aoi_d;
mfbi->y_aoi_d = aoi_d.y_aoi_d;
fsl_diu_check_var(&info->var, info);
fsl_diu_set_aoi(info);
break;
case MFB_GET_AOID:
aoi_d.x_aoi_d = mfbi->x_aoi_d;
aoi_d.y_aoi_d = mfbi->y_aoi_d;
if (copy_to_user(buf, &aoi_d, sizeof(aoi_d)))
return -EFAULT;
break;
case MFB_GET_ALPHA:
global_alpha = mfbi->g_alpha;
if (copy_to_user(buf, &global_alpha, sizeof(global_alpha)))
return -EFAULT;
break;
case MFB_SET_ALPHA:
/* set panel information */
if (copy_from_user(&global_alpha, buf, sizeof(global_alpha)))
return -EFAULT;
ad->src_size_g_alpha = (ad->src_size_g_alpha & (~0xff)) |
(global_alpha & 0xff);
mfbi->g_alpha = global_alpha;
break;
case MFB_SET_CHROMA_KEY:
/* set panel winformation */
if (copy_from_user(&ck, buf, sizeof(ck)))
return -EFAULT;
if (ck.enable &&
(ck.red_max < ck.red_min ||
ck.green_max < ck.green_min ||
ck.blue_max < ck.blue_min))
return -EINVAL;
if (!ck.enable) {
ad->ckmax_r = 0;
ad->ckmax_g = 0;
ad->ckmax_b = 0;
ad->ckmin_r = 255;
ad->ckmin_g = 255;
ad->ckmin_b = 255;
} else {
ad->ckmax_r = ck.red_max;
ad->ckmax_g = ck.green_max;
ad->ckmax_b = ck.blue_max;
ad->ckmin_r = ck.red_min;
ad->ckmin_g = ck.green_min;
ad->ckmin_b = ck.blue_min;
}
break;
default:
dev_err(info->dev, "unknown ioctl command (0x%08X)\n", cmd);
return -ENOIOCTLCMD;
}
return 0;
}
/* turn on fb if count == 1
*/
static int fsl_diu_open(struct fb_info *info, int user)
{
struct mfb_info *mfbi = info->par;
int res = 0;
/* free boot splash memory on first /dev/fb0 open */
if ((mfbi->index == PLANE0) && diu_ops.release_bootmem)
diu_ops.release_bootmem();
spin_lock(&diu_lock);
mfbi->count++;
if (mfbi->count == 1) {
fsl_diu_check_var(&info->var, info);
res = fsl_diu_set_par(info);
if (res < 0)
mfbi->count--;
else
fsl_diu_enable_panel(info);
}
spin_unlock(&diu_lock);
return res;
}
/* turn off fb if count == 0
*/
static int fsl_diu_release(struct fb_info *info, int user)
{
struct mfb_info *mfbi = info->par;
int res = 0;
spin_lock(&diu_lock);
mfbi->count--;
if (mfbi->count == 0)
fsl_diu_disable_panel(info);
spin_unlock(&diu_lock);
return res;
}
static struct fb_ops fsl_diu_ops = {
.owner = THIS_MODULE,
.fb_check_var = fsl_diu_check_var,
.fb_set_par = fsl_diu_set_par,
.fb_setcolreg = fsl_diu_setcolreg,
.fb_pan_display = fsl_diu_pan_display,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_ioctl = fsl_diu_ioctl,
.fb_open = fsl_diu_open,
.fb_release = fsl_diu_release,
};
static int __devinit install_fb(struct fb_info *info)
{
int rc;
struct mfb_info *mfbi = info->par;
const char *aoi_mode, *init_aoi_mode = "320x240";
struct fb_videomode *db = fsl_diu_mode_db;
unsigned int dbsize = ARRAY_SIZE(fsl_diu_mode_db);
int has_default_mode = 1;
info->var.activate = FB_ACTIVATE_NOW;
info->fbops = &fsl_diu_ops;
info->flags = FBINFO_DEFAULT | FBINFO_VIRTFB | FBINFO_PARTIAL_PAN_OK |
FBINFO_READS_FAST;
info->pseudo_palette = mfbi->pseudo_palette;
rc = fb_alloc_cmap(&info->cmap, 16, 0);
if (rc)
return rc;
if (mfbi->index == PLANE0) {
if (mfbi->edid_data) {
/* Now build modedb from EDID */
fb_edid_to_monspecs(mfbi->edid_data, &info->monspecs);
fb_videomode_to_modelist(info->monspecs.modedb,
info->monspecs.modedb_len,
&info->modelist);
db = info->monspecs.modedb;
dbsize = info->monspecs.modedb_len;
}
aoi_mode = fb_mode;
} else {
aoi_mode = init_aoi_mode;
}
rc = fb_find_mode(&info->var, info, aoi_mode, db, dbsize, NULL,
default_bpp);
if (!rc) {
/*
* For plane 0 we continue and look into
* driver's internal modedb.
*/
if ((mfbi->index == PLANE0) && mfbi->edid_data)
has_default_mode = 0;
else
return -EINVAL;
}
if (!has_default_mode) {
rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
ARRAY_SIZE(fsl_diu_mode_db), NULL, default_bpp);
if (rc)
has_default_mode = 1;
}
/* Still not found, use preferred mode from database if any */
if (!has_default_mode && info->monspecs.modedb) {
struct fb_monspecs *specs = &info->monspecs;
struct fb_videomode *modedb = &specs->modedb[0];
/*
* Get preferred timing. If not found,
* first mode in database will be used.
*/
if (specs->misc & FB_MISC_1ST_DETAIL) {
int i;
for (i = 0; i < specs->modedb_len; i++) {
if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
modedb = &specs->modedb[i];
break;
}
}
}
info->var.bits_per_pixel = default_bpp;
fb_videomode_to_var(&info->var, modedb);
}
if (fsl_diu_check_var(&info->var, info)) {
dev_err(info->dev, "fsl_diu_check_var failed\n");
unmap_video_memory(info);
fb_dealloc_cmap(&info->cmap);
return -EINVAL;
}
if (register_framebuffer(info) < 0) {
dev_err(info->dev, "register_framebuffer failed\n");
unmap_video_memory(info);
fb_dealloc_cmap(&info->cmap);
return -EINVAL;
}
mfbi->registered = 1;
dev_info(info->dev, "%s registered successfully\n", mfbi->id);
return 0;
}
static void uninstall_fb(struct fb_info *info)
{
struct mfb_info *mfbi = info->par;
if (!mfbi->registered)
return;
if (mfbi->index == PLANE0)
kfree(mfbi->edid_data);
unregister_framebuffer(info);
unmap_video_memory(info);
if (&info->cmap)
fb_dealloc_cmap(&info->cmap);
mfbi->registered = 0;
}
static irqreturn_t fsl_diu_isr(int irq, void *dev_id)
{
struct diu __iomem *hw = dev_id;
unsigned int status = in_be32(&hw->int_status);
if (status) {
/* This is the workaround for underrun */
if (status & INT_UNDRUN) {
out_be32(&hw->diu_mode, 0);
udelay(1);
out_be32(&hw->diu_mode, 1);
}
#if defined(CONFIG_NOT_COHERENT_CACHE)
else if (status & INT_VSYNC) {
unsigned int i;
for (i = 0; i < coherence_data_size;
i += d_cache_line_size)
__asm__ __volatile__ (
"dcbz 0, %[input]"
::[input]"r"(&coherence_data[i]));
}
#endif
return IRQ_HANDLED;
}
return IRQ_NONE;
}
static int request_irq_local(struct fsl_diu_data *data)
{
struct diu __iomem *hw = data->diu_reg;
u32 ints;
int ret;
/* Read to clear the status */
in_be32(&hw->int_status);
ret = request_irq(data->irq, fsl_diu_isr, 0, "fsl-diu-fb", hw);
if (!ret) {
ints = INT_PARERR | INT_LS_BF_VS;
#if !defined(CONFIG_NOT_COHERENT_CACHE)
ints |= INT_VSYNC;
#endif
/* Read to clear the status */
in_be32(&hw->int_status);
out_be32(&hw->int_mask, ints);
}
return ret;
}
static void free_irq_local(struct fsl_diu_data *data)
{
struct diu __iomem *hw = data->diu_reg;
/* Disable all LCDC interrupt */
out_be32(&hw->int_mask, 0x1f);
free_irq(data->irq, NULL);
}
#ifdef CONFIG_PM
/*
* Power management hooks. Note that we won't be called from IRQ context,
* unlike the blank functions above, so we may sleep.
*/
static int fsl_diu_suspend(struct platform_device *ofdev, pm_message_t state)
{
struct fsl_diu_data *data;
data = dev_get_drvdata(&ofdev->dev);
disable_lcdc(data->fsl_diu_info);
return 0;
}
static int fsl_diu_resume(struct platform_device *ofdev)
{
struct fsl_diu_data *data;
data = dev_get_drvdata(&ofdev->dev);
enable_lcdc(data->fsl_diu_info);
return 0;
}
#else
#define fsl_diu_suspend NULL
#define fsl_diu_resume NULL
#endif /* CONFIG_PM */
static ssize_t store_monitor(struct device *device,
struct device_attribute *attr, const char *buf, size_t count)
{
enum fsl_diu_monitor_port old_monitor_port;
struct fsl_diu_data *data =
container_of(attr, struct fsl_diu_data, dev_attr);
old_monitor_port = data->monitor_port;
data->monitor_port = fsl_diu_name_to_port(buf);
if (old_monitor_port != data->monitor_port) {
/* All AOIs need adjust pixel format
* fsl_diu_set_par only change the pixsel format here
* unlikely to fail. */
unsigned int i;
for (i=0; i < NUM_AOIS; i++)
fsl_diu_set_par(&data->fsl_diu_info[i]);
}
return count;
}
static ssize_t show_monitor(struct device *device,
struct device_attribute *attr, char *buf)
{
struct fsl_diu_data *data =
container_of(attr, struct fsl_diu_data, dev_attr);
switch (data->monitor_port) {
case FSL_DIU_PORT_DVI:
return sprintf(buf, "DVI\n");
case FSL_DIU_PORT_LVDS:
return sprintf(buf, "Single-link LVDS\n");
case FSL_DIU_PORT_DLVDS:
return sprintf(buf, "Dual-link LVDS\n");
}
return 0;
}
static int __devinit fsl_diu_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct mfb_info *mfbi;
struct fsl_diu_data *data;
int diu_mode;
dma_addr_t dma_addr; /* DMA addr of fsl_diu_data struct */
unsigned int i;
int ret;
data = dma_alloc_coherent(&pdev->dev, sizeof(struct fsl_diu_data),
&dma_addr, GFP_DMA | __GFP_ZERO);
if (!data)
return -ENOMEM;
data->dma_addr = dma_addr;
/*
* dma_alloc_coherent() uses a page allocator, so the address is
* always page-aligned. We need the memory to be 32-byte aligned,
* so that's good. However, if one day the allocator changes, we
* need to catch that. It's not worth the effort to handle unaligned
* alloctions now because it's highly unlikely to ever be a problem.
*/
if ((unsigned long)data & 31) {
dev_err(&pdev->dev, "misaligned allocation");
ret = -ENOMEM;
goto error;
}
spin_lock_init(&data->reg_lock);
for (i = 0; i < NUM_AOIS; i++) {
struct fb_info *info = &data->fsl_diu_info[i];
info->device = &pdev->dev;
info->par = &data->mfb[i];
/*
* We store the physical address of the AD in the reserved
* 'paddr' field of the AD itself.
*/
data->ad[i].paddr = DMA_ADDR(data, ad[i]);
info->fix.smem_start = 0;
/* Initialize the AOI data structure */
mfbi = info->par;
memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info));
mfbi->parent = data;
mfbi->ad = &data->ad[i];
if (mfbi->index == PLANE0) {
const u8 *prop;
int len;
/* Get EDID */
prop = of_get_property(np, "edid", &len);
if (prop && len == EDID_LENGTH)
mfbi->edid_data = kmemdup(prop, EDID_LENGTH,
GFP_KERNEL);
}
}
data->diu_reg = of_iomap(np, 0);
if (!data->diu_reg) {
dev_err(&pdev->dev, "cannot map DIU registers\n");
ret = -EFAULT;
goto error;
}
diu_mode = in_be32(&data->diu_reg->diu_mode);
if (diu_mode == MFB_MODE0)
out_be32(&data->diu_reg->diu_mode, 0); /* disable DIU */
/* Get the IRQ of the DIU */
data->irq = irq_of_parse_and_map(np, 0);
if (!data->irq) {
dev_err(&pdev->dev, "could not get DIU IRQ\n");
ret = -EINVAL;
goto error;
}
data->monitor_port = monitor_port;
/* Initialize the dummy Area Descriptor */
data->dummy_ad.addr = cpu_to_le32(DMA_ADDR(data, dummy_aoi));
data->dummy_ad.pix_fmt = 0x88882317;
data->dummy_ad.src_size_g_alpha = cpu_to_le32((4 << 12) | 4);
data->dummy_ad.aoi_size = cpu_to_le32((4 << 16) | 2);
data->dummy_ad.offset_xyi = 0;
data->dummy_ad.offset_xyd = 0;
data->dummy_ad.next_ad = 0;
data->dummy_ad.paddr = DMA_ADDR(data, dummy_ad);
/*
* Let DIU display splash screen if it was pre-initialized
* by the bootloader, set dummy area descriptor otherwise.
*/
if (diu_mode == MFB_MODE0)
out_be32(&data->diu_reg->desc[0], data->dummy_ad.paddr);
out_be32(&data->diu_reg->desc[1], data->dummy_ad.paddr);
out_be32(&data->diu_reg->desc[2], data->dummy_ad.paddr);
for (i = 0; i < NUM_AOIS; i++) {
ret = install_fb(&data->fsl_diu_info[i]);
if (ret) {
dev_err(&pdev->dev, "could not register fb %d\n", i);
goto error;
}
}
if (request_irq_local(data)) {
dev_err(&pdev->dev, "could not claim irq\n");
goto error;
}
sysfs_attr_init(&data->dev_attr.attr);
data->dev_attr.attr.name = "monitor";
data->dev_attr.attr.mode = S_IRUGO|S_IWUSR;
data->dev_attr.show = show_monitor;
data->dev_attr.store = store_monitor;
ret = device_create_file(&pdev->dev, &data->dev_attr);
if (ret) {
dev_err(&pdev->dev, "could not create sysfs file %s\n",
data->dev_attr.attr.name);
}
dev_set_drvdata(&pdev->dev, data);
return 0;
error:
for (i = 0; i < NUM_AOIS; i++)
uninstall_fb(&data->fsl_diu_info[i]);
iounmap(data->diu_reg);
dma_free_coherent(&pdev->dev, sizeof(struct fsl_diu_data), data,
data->dma_addr);
return ret;
}
static int fsl_diu_remove(struct platform_device *pdev)
{
struct fsl_diu_data *data;
int i;
data = dev_get_drvdata(&pdev->dev);
disable_lcdc(&data->fsl_diu_info[0]);
free_irq_local(data);
for (i = 0; i < NUM_AOIS; i++)
uninstall_fb(&data->fsl_diu_info[i]);
iounmap(data->diu_reg);
dma_free_coherent(&pdev->dev, sizeof(struct fsl_diu_data), data,
data->dma_addr);
return 0;
}
#ifndef MODULE
static int __init fsl_diu_setup(char *options)
{
char *opt;
unsigned long val;
if (!options || !*options)
return 0;
while ((opt = strsep(&options, ",")) != NULL) {
if (!*opt)
continue;
if (!strncmp(opt, "monitor=", 8)) {
monitor_port = fsl_diu_name_to_port(opt + 8);
} else if (!strncmp(opt, "bpp=", 4)) {
if (!strict_strtoul(opt + 4, 10, &val))
default_bpp = val;
} else
fb_mode = opt;
}
return 0;
}
#endif
static struct of_device_id fsl_diu_match[] = {
#ifdef CONFIG_PPC_MPC512x
{
.compatible = "fsl,mpc5121-diu",
},
#endif
{
.compatible = "fsl,diu",
},
{}
};
MODULE_DEVICE_TABLE(of, fsl_diu_match);
static struct platform_driver fsl_diu_driver = {
.driver = {
.name = "fsl-diu-fb",
.owner = THIS_MODULE,
.of_match_table = fsl_diu_match,
},
.probe = fsl_diu_probe,
.remove = fsl_diu_remove,
.suspend = fsl_diu_suspend,
.resume = fsl_diu_resume,
};
static int __init fsl_diu_init(void)
{
#ifdef CONFIG_NOT_COHERENT_CACHE
struct device_node *np;
const u32 *prop;
#endif
int ret;
#ifndef MODULE
char *option;
/*
* For kernel boot options (in 'video=xxxfb:<options>' format)
*/
if (fb_get_options("fslfb", &option))
return -ENODEV;
fsl_diu_setup(option);
#else
monitor_port = fsl_diu_name_to_port(monitor_string);
#endif
pr_info("Freescale Display Interface Unit (DIU) framebuffer driver\n");
#ifdef CONFIG_NOT_COHERENT_CACHE
np = of_find_node_by_type(NULL, "cpu");
if (!np) {
pr_err("fsl-diu-fb: can't find 'cpu' device node\n");
return -ENODEV;
}
prop = of_get_property(np, "d-cache-size", NULL);
if (prop == NULL) {
pr_err("fsl-diu-fb: missing 'd-cache-size' property' "
"in 'cpu' node\n");
of_node_put(np);
return -ENODEV;
}
/*
* Freescale PLRU requires 13/8 times the cache size to do a proper
* displacement flush
*/
coherence_data_size = be32_to_cpup(prop) * 13;
coherence_data_size /= 8;
prop = of_get_property(np, "d-cache-line-size", NULL);
if (prop == NULL) {
pr_err("fsl-diu-fb: missing 'd-cache-line-size' property' "
"in 'cpu' node\n");
of_node_put(np);
return -ENODEV;
}
d_cache_line_size = be32_to_cpup(prop);
of_node_put(np);
coherence_data = vmalloc(coherence_data_size);
if (!coherence_data)
return -ENOMEM;
#endif
ret = platform_driver_register(&fsl_diu_driver);
if (ret) {
pr_err("fsl-diu-fb: failed to register platform driver\n");
#if defined(CONFIG_NOT_COHERENT_CACHE)
vfree(coherence_data);
#endif
}
return ret;
}
static void __exit fsl_diu_exit(void)
{
platform_driver_unregister(&fsl_diu_driver);
#if defined(CONFIG_NOT_COHERENT_CACHE)
vfree(coherence_data);
#endif
}
module_init(fsl_diu_init);
module_exit(fsl_diu_exit);
MODULE_AUTHOR("York Sun <yorksun@freescale.com>");
MODULE_DESCRIPTION("Freescale DIU framebuffer driver");
MODULE_LICENSE("GPL");
module_param_named(mode, fb_mode, charp, 0);
MODULE_PARM_DESC(mode,
"Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
module_param_named(bpp, default_bpp, ulong, 0);
MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified in 'mode'");
module_param_named(monitor, monitor_string, charp, 0);
MODULE_PARM_DESC(monitor, "Specify the monitor port "
"(\"dvi\", \"lvds\", or \"dlvds\") if supported by the platform");
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